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FFmpeg/libavcodec/vvc/ps.h

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/*
* VVC parameter set parser
*
* Copyright (C) 2023 Nuo Mi
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_VVC_PS_H
#define AVCODEC_VVC_PS_H
#include "libavcodec/cbs_h266.h"
#include "libavcodec/vvc.h"
#define IS_IDR(s) ((s)->vcl_unit_type == VVC_IDR_W_RADL || (s)->vcl_unit_type == VVC_IDR_N_LP)
#define IS_CRA(s) ((s)->vcl_unit_type == VVC_CRA_NUT)
#define IS_IRAP(s) (IS_IDR(s) || IS_CRA(s))
#define IS_GDR(s) ((s)->vcl_unit_type == VVC_GDR_NUT)
#define IS_CVSS(s) (IS_IRAP(s)|| IS_GDR(s))
#define IS_CLVSS(s) (IS_CVSS(s) && s->no_output_before_recovery_flag)
#define IS_RASL(s) ((s)->vcl_unit_type == VVC_RASL_NUT)
#define IS_RADL(s) ((s)->vcl_unit_type == VVC_RADL_NUT)
#define IS_I(rsh) ((rsh)->sh_slice_type == VVC_SLICE_TYPE_I)
#define IS_P(rsh) ((rsh)->sh_slice_type == VVC_SLICE_TYPE_P)
#define IS_B(rsh) ((rsh)->sh_slice_type == VVC_SLICE_TYPE_B)
#define INV_POC INT_MIN
#define GDR_IS_RECOVERED(s) (s->gdr_recovery_point_poc == INV_POC)
#define GDR_SET_RECOVERED(s) (s->gdr_recovery_point_poc = INV_POC)
#define LMCS_MAX_BIT_DEPTH 12
#define LMCS_MAX_LUT_SIZE (1 << LMCS_MAX_BIT_DEPTH)
#define LMCS_MAX_BIN_SIZE 16
#define LADF_MAX_INTERVAL 5
enum {
CHROMA_FORMAT_MONO,
CHROMA_FORMAT_420,
CHROMA_FORMAT_422,
CHROMA_FORMAT_444,
};
typedef struct VVCSPS {
const H266RawSPS *r; ///< RefStruct reference
//derived values
uint8_t hshift[VVC_MAX_SAMPLE_ARRAYS];
uint8_t vshift[VVC_MAX_SAMPLE_ARRAYS];
uint32_t max_pic_order_cnt_lsb; ///< MaxPicOrderCntLsb
uint8_t pixel_shift;
enum AVPixelFormat pix_fmt;
uint8_t bit_depth; ///< BitDepth
uint8_t qp_bd_offset; ///< QpBdOffset
uint8_t ctb_log2_size_y; ///< CtbLog2SizeY
uint16_t ctb_size_y; ///< CtbSizeY
uint8_t min_cb_log2_size_y; ///< MinCbLog2SizeY
uint8_t min_cb_size_y; ///< MinCbSizeY
uint8_t max_tb_size_y; ///< MaxTbSizeY
uint8_t max_ts_size; ///< MaxTsSize
uint8_t max_num_merge_cand; ///< MaxNumMergeCand
uint8_t max_num_ibc_merge_cand; ///< MaxNumIbcMergeCand
uint8_t max_num_gpm_merge_cand; ///< MaxNumGpmMergeCand
uint8_t num_ladf_intervals; ///< sps_num_ladf_intervals_minus2 + 2;
uint32_t ladf_interval_lower_bound[LADF_MAX_INTERVAL]; ///< SpsLadfIntervalLowerBound[]
uint8_t log2_parallel_merge_level; ///< sps_log2_parallel_merge_level_minus2 + 2;
uint8_t log2_transform_range; ///< Log2TransformRange
int8_t chroma_qp_table[3][VVC_MAX_POINTS_IN_QP_TABLE]; ///< ChromaQpTable
} VVCSPS;
typedef struct DBParams {
int8_t beta_offset[VVC_MAX_SAMPLE_ARRAYS];
int8_t tc_offset[VVC_MAX_SAMPLE_ARRAYS];
} DBParams;
typedef struct VVCPPS {
const H266RawPPS *r; ///< RefStruct reference
//derived value;
int8_t chroma_qp_offset[3]; ///< pps_cb_qp_offset, pps_cr_qp_offset, pps_joint_cbcr_qp_offset_value
int8_t chroma_qp_offset_list[6][3]; ///< pps_cb_qp_offset_list, pps_cr_qp_offset_list, pps_joint_cbcr_qp_offset_list
uint16_t width;
uint16_t height;
uint16_t slice_start_offset[VVC_MAX_SLICES];
uint16_t num_ctus_in_slice [VVC_MAX_SLICES];
uint16_t min_cb_width;
uint16_t min_cb_height;
uint16_t ctb_width;
uint16_t ctb_height;
uint32_t ctb_count;
uint16_t min_pu_width;
uint16_t min_pu_height;
uint16_t min_tu_width;
uint16_t min_tu_height;
uint32_t *ctb_addr_in_slice; ///< CtbAddrInCurrSlice for entire picture
uint16_t *col_bd; ///< TileColBdVal
uint16_t *row_bd; ///< TileRowBdVal
uint16_t *ctb_to_col_bd; ///< CtbToTileColBd
uint16_t *ctb_to_row_bd; ///< CtbToTileRowBd
uint16_t width32; ///< width in 32 pixels
uint16_t height32; ///< height in 32 pixels
uint16_t width64; ///< width in 64 pixels
uint16_t height64; ///< height in 64 pixels
uint16_t ref_wraparound_offset; ///< PpsRefWraparoundOffset
uint16_t subpic_x[VVC_MAX_SLICES]; ///< SubpicLeftBoundaryPos
uint16_t subpic_y[VVC_MAX_SLICES]; ///< SubpicTopBoundaryPos
uint16_t subpic_width[VVC_MAX_SLICES];
uint16_t subpic_height[VVC_MAX_SLICES];
} VVCPPS;
#define MAX_WEIGHTS 15
typedef struct PredWeightTable {
uint8_t log2_denom[2]; ///< luma_log2_weight_denom, ChromaLog2WeightDenom
uint8_t nb_weights[2]; ///< num_l0_weights, num_l1_weights
uint8_t weight_flag[2][2][MAX_WEIGHTS]; ///< luma_weight_l0_flag, chroma_weight_l0_flag,
///< luma_weight_l1_flag, chroma_weight_l1_flag,
int16_t weight[2][VVC_MAX_SAMPLE_ARRAYS][MAX_WEIGHTS]; ///< LumaWeightL0, LumaWeightL1, ChromaWeightL0, ChromaWeightL1
int16_t offset[2][VVC_MAX_SAMPLE_ARRAYS][MAX_WEIGHTS]; ///< luma_offset_l0, luma_offset_l1, ChromaOffsetL0, ChromaOffsetL1
} PredWeightTable;
typedef struct VVCPH {
const H266RawPictureHeader *r;
void *rref; ///< RefStruct reference, backing ph above
//derived values
uint32_t max_num_subblock_merge_cand; ///< MaxNumSubblockMergeCand
int32_t poc; ///< PicOrderCntVal
uint8_t num_ver_vbs; ///< NumVerVirtualBoundaries
uint16_t vb_pos_x[VVC_MAX_VBS]; ///< VirtualBoundaryPosX
uint8_t num_hor_vbs; ///< NumHorVirtualBoundaries
uint16_t vb_pos_y[VVC_MAX_VBS]; ///< VirtualBoundaryPosY
PredWeightTable pwt;
} VVCPH;
#define ALF_NUM_FILTERS_LUMA 25
#define ALF_NUM_FILTERS_CHROMA 8
#define ALF_NUM_FILTERS_CC 4
#define ALF_NUM_COEFF_LUMA 12
#define ALF_NUM_COEFF_CHROMA 6
#define ALF_NUM_COEFF_CC 7
typedef struct VVCALF {
int16_t luma_coeff [ALF_NUM_FILTERS_LUMA][ALF_NUM_COEFF_LUMA];
uint8_t luma_clip_idx [ALF_NUM_FILTERS_LUMA][ALF_NUM_COEFF_LUMA];
uint8_t num_chroma_filters;
int16_t chroma_coeff [ALF_NUM_FILTERS_CHROMA][ALF_NUM_COEFF_CHROMA];
uint8_t chroma_clip_idx[ALF_NUM_FILTERS_CHROMA][ALF_NUM_COEFF_CHROMA];
uint8_t num_cc_filters[2]; ///< alf_cc_cb_filters_signalled_minus1 + 1, alf_cc_cr_filters_signalled_minus1 + 1
int16_t cc_coeff[2][ALF_NUM_FILTERS_CC][ALF_NUM_COEFF_CC];
} VVCALF;
enum {
SL_START_2x2 = 0,
SL_START_4x4 = 2,
SL_START_8x8 = 8,
SL_START_16x16 = 14,
SL_START_32x32 = 20,
SL_START_64x64 = 26,
SL_MAX_ID = 28,
};
#define SL_MAX_MATRIX_SIZE 8
typedef struct VVCScalingList {
uint8_t scaling_matrix_rec[SL_MAX_ID][SL_MAX_MATRIX_SIZE * SL_MAX_MATRIX_SIZE]; ///< ScalingMatrixRec
uint8_t scaling_matrix_dc_rec[SL_MAX_ID - SL_START_16x16]; ///< ScalingMatrixDcRec[refId − 14]
} VVCScalingList;
typedef struct VVCLMCS {
uint8_t min_bin_idx;
uint8_t max_bin_idx;
union {
uint8_t u8[LMCS_MAX_LUT_SIZE];
uint16_t u16[LMCS_MAX_LUT_SIZE]; ///< for high bit-depth
} fwd_lut, inv_lut;
uint16_t pivot[LMCS_MAX_BIN_SIZE + 1];
uint16_t chroma_scale_coeff[LMCS_MAX_BIN_SIZE];
} VVCLMCS;
#define VVC_MAX_ALF_COUNT 8
#define VVC_MAX_LMCS_COUNT 4
#define VVC_MAX_SL_COUNT 8
typedef struct VVCParamSets {
const VVCSPS *sps_list[VVC_MAX_SPS_COUNT]; ///< RefStruct reference
const VVCPPS *pps_list[VVC_MAX_PPS_COUNT]; ///< RefStruct reference
const VVCALF *alf_list[VVC_MAX_ALF_COUNT]; ///< RefStruct reference
const H266RawAPS *lmcs_list[VVC_MAX_LMCS_COUNT]; ///< RefStruct reference
const VVCScalingList *scaling_list[VVC_MAX_SL_COUNT]; ///< RefStruct reference
// Bit field of SPS IDs used in the current CVS
uint16_t sps_id_used;
} VVCParamSets;
typedef struct VVCFrameParamSets {
const VVCSPS *sps; ///< RefStruct reference
const VVCPPS *pps; ///< RefStruct reference
VVCPH ph;
const VVCALF *alf_list[VVC_MAX_ALF_COUNT]; ///< RefStruct reference
VVCLMCS lmcs;
const VVCScalingList *sl; ///< RefStruct reference
} VVCFrameParamSets;
typedef struct VVCSH {
const H266RawSliceHeader *r; ///< RefStruct reference
// derived values
// ctu address
uint32_t num_ctus_in_curr_slice; ///< NumCtusInCurrSlice
const uint32_t* ctb_addr_in_curr_slice; ///< CtbAddrInCurrSlice
// inter
PredWeightTable pwt;
int8_t ref_idx_sym[2]; ///< RefIdxSymL0, RefIdxSymL1
// qp_y
int8_t slice_qp_y; ///< SliceQpY
// deblock_offsets
DBParams deblock;
// partition constrains
uint8_t min_qt_size[2]; ///< MinQtSizeY, MinQtSizeC
uint8_t max_bt_size[2]; ///< MaxBtSizeY, MaxBtSizeC
uint8_t max_tt_size[2]; ///< MaxTtSizeY, MaxTtSizeC
uint8_t max_mtt_depth[2]; ///< MaxMttDepthY, MaxMttDepthC
uint8_t cu_qp_delta_subdiv; ///< CuQpDeltaSubdiv
uint8_t cu_chroma_qp_offset_subdiv; ///< CuChromaQpOffsetSubdiv
// entries
uint32_t entry_point_start_ctu[VVC_MAX_ENTRY_POINTS]; ///< entry point start in ctu_addr
} VVCSH;
struct VVCContext;
int ff_vvc_decode_frame_ps(VVCFrameParamSets *fps, struct VVCContext *s);
int ff_vvc_decode_aps(VVCParamSets *ps, const CodedBitstreamUnit *unit);
int ff_vvc_decode_sh(VVCSH *sh, const VVCFrameParamSets *ps, const CodedBitstreamUnit *unit);
void ff_vvc_frame_ps_free(VVCFrameParamSets *fps);
void ff_vvc_ps_uninit(VVCParamSets *ps);
#endif /* AVCODEC_VVC_PS_H */